Crystal · Deodorant
Aluna Stick Deodorant
Lower concern, mineral salt deodorants rarely use PFAS, but brand transparency is absent.
Crystal's stick deodorant is formulated from mineral salts (typically potassium or ammonium alum), a class of product with historically low PFAS risk because they require no water-resistant or nonstick coatings.
Shop Crystal on Amazon →Material
mineral salts (potassium alum or ammonium alum); no synthetic coating
Brand disclosure
Brand is silent on PFAS
Lab data
No public lab test
Why this grade
Category baseline
cosmetics is a category where PFAS exposure is more common.
No PFAS disclosure
No public statement about PFAS in this product.
Safe base material
Made from a material with no inherent PFAS use (ceramic, mineral, or natural fiber).
The full breakdown
What it's made of and why it matters
Aluna Stick uses potassium alum or ammonium alum salts, naturally occurring mineral compounds that work by forming a protective layer on skin and inhibiting bacterial growth without blocking sweat. These salts have been used in personal care for decades and are not synthetic chemicals. Unlike antiperspirants, alum deodorants do not contain aluminum chlorohydrate or other aluminum compounds designed to plug sweat ducts, reducing systemic absorption risk.
The brand's record and disclosure
Crystal (owned by Coty Inc.) has maintained a minimal public stance on ingredient sourcing and third-party testing for this product line. The brand does not highlight certifications such as EWG Verified, Leaping Bunny, or NSF standards on marketed materials. No significant safety recalls or regulatory actions are on record for this specific deodorant, but the brand's silence on manufacturing controls and heavy metal testing of mineral salts limits independent verification.
How it compares in its category
Mineral salt deodorants sit at the lower-toxicity end of the deodorant spectrum, avoiding synthetic preservatives, fragrance blends, and antiperspirant actives found in conventional stick formulas. They carry less risk of allergic contact dermatitis than products with added botanicals or essential oils. However, they are less effective for heavy perspiration than antiperspirants and may feel less cosmetically elegant than talc-containing or silicone-based alternatives.
If you buy it
Store in a cool, dry place to prevent the stick from crumbling or absorbing moisture. The crystal will gradually wear down with use; replace when material becomes too small to apply comfortably, typically every 6-12 months depending on frequency. Wet skin slightly before application for even coverage and to reduce dust. If skin irritation or rash develops, discontinue use; pure mineral salts are well-tolerated but individual sensitivity is possible.
Beyond PFAS: other things we checked
Established hazard classes for this product type, assessed from public information. These never change the PFAS grade; a Likely flag caps the Verdict at “Buy with care.”
Heavy metals in mineral salts (lead, cadmium, arsenic)
Potassium and ammonium alum are mined minerals and can contain trace heavy metal contaminants depending on source and refining. Crystal has not published third-party heavy metal testing data for this product. Risk is lower than synthetic additives but unverified.
Skin irritation or allergic contact dermatitis
Pure mineral salt deodorants are generally well-tolerated, but occasional contact irritation has been anecdotally reported in sensitive individuals. No formal adverse event database entries are on record for this specific brand, but irritation risk exists with any topical product.
Talc or talc-like mineral contaminants
Aluma Stick formulations typically do not include talc filler. However, if the product contains anti-caking agents or flow additives from the mining or processing stage, trace silicate minerals could be present. Brand does not detail secondary ingredients or processing aids.
Fragrance allergens (if scented variant)
If the product contains added fragrance oils or essential oils, these can trigger contact dermatitis or respiratory irritation in sensitive users. Crystal markets both scented and unscented versions; fragrance ingredient lists are not consistently disclosed.
Bacterial or mold growth in stick form
The mineral salt base and solid form inhibit microbial growth under normal storage. Risk is negligible if kept dry. No documented contamination incidents are on record for this product line.
What we don’t know
This grade is a model-based estimate from public materials, coatings, and brand disclosure at 78% confidence. It is not a lab result.
No independent PFAS lab test is on record for this exact product. A lab test could move the score in either direction.
The brand has not made a specific, verifiable PFAS-free statement, so part of this score reflects that missing disclosure rather than a confirmed material.
Formulations and coatings change between production runs. Always check the current label before buying.
Safer alternatives in Deodorant
Tom's of Maine
Deodorant
mineral-based, baking soda formulation
Lower concern, mineral-based formula with public PFAS-free positioning, though no independent third-party verification.
⚠Risky category by default
Tom's of Maine
Most-Loved Deodorant Bundle
mineral-based and plant-derived actives; stick formulation
Lower-concern deodorant; mineral-based formula with PFAS-free claim aligns with brand ethos, but no third-party verification found.
⚠Risky category by default
Tom's of Maine
Antiperspirant Deodorant
mineral-based active ingredients, plant-derived botanicals, no synthetic water-repellent coatings
Lower PFAS concern, mineral-based formula with MADE SAFE cert; antiperspirant category has minimal waterproof-coating risk.
✓Verified PFAS-free by a third party
More deodorant grades
How we score: every product runs through the same public 0–100 rubric based on materials, coatings, brand disclosure, lab findings, and recalls. See the full methodology → Spotted a mistake? Report an error.